Men's shoes ARE different. To get decent and fairly priced steel toe caps ( women's are available but are less durable and £££) I have men's. I'm a size 7- but the men's 7 is too big, wide and long. I wear extra socks to get around this.
I need steel toe caps too and luckily a men's 7 is perfect for me. The shop I went to recently had only one 'ladies' style which had pink bits on. The assistant insisted I try them on. I did, and they were really uncomfortable. I kept saying it's ok, I don't need my work shoes to have pink on, or look decorative... came away with some nice brown leather boots, and shop assistant looking baffled.
Surely it wouldn't be hard for them to make the sensible and affordable 'mens' brown/black safety boots in some smaller sizes.